Revert "Don't call RewriteDriver::SetUserAgent as the user-agent is already in the request-headers"
Revert "Don't call RewriteDriver::SetUserAgent as the user-agent is already in the request-headers"

This reverts commit 6ccc1c513b6226c13c9e53d3133c7677d2109005.

pagespeed/ngx_pagespeed,pagespeed/ngx_pagespeed